The Lotus Sutra
Amphitrite still hasn't found her missing pearl.
Here are a few more clues to help her out.
 The Lotus Sutra – The Dragon King's daughter attains enlightenment through the Lotus Sutra at age eight, then leaves to prove her wisdom to the Buddha in India.
 The Fortress – Often inhabited by The Sorcerer, The Fortress is NOT the location of the missing pearl.
The Dragon King's Daughter [https://www.nichirenlibrary.org/en/dic/Content/D/116]